437 lines
12 KiB
C
437 lines
12 KiB
C
/*======================================================================
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A PCMCIA token-ring driver for IBM-based cards
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This driver supports the IBM PCMCIA Token-Ring Card.
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Written by Steve Kipisz, kipisz@vnet.ibm.com or
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bungy@ibm.net
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Written 1995,1996.
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This code is based on pcnet_cs.c from David Hinds.
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V2.2.0 February 1999 - Mike Phillips phillim@amtrak.com
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Linux V2.2.x presented significant changes to the underlying
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ibmtr.c code. Mainly the code became a lot more organized and
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modular.
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This caused the old PCMCIA Token Ring driver to give up and go
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home early. Instead of just patching the old code to make it
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work, the PCMCIA code has been streamlined, updated and possibly
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improved.
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This code now only contains code required for the Card Services.
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All we do here is set the card up enough so that the real ibmtr.c
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driver can find it and work with it properly.
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i.e. We set up the io port, irq, mmio memory and shared ram
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memory. This enables ibmtr_probe in ibmtr.c to find the card and
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configure it as though it was a normal ISA and/or PnP card.
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CHANGES
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v2.2.5 April 1999 Mike Phillips (phillim@amtrak.com)
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Obscure bug fix, required changed to ibmtr.c not ibmtr_cs.c
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v2.2.7 May 1999 Mike Phillips (phillim@amtrak.com)
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Updated to version 2.2.7 to match the first version of the kernel
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that the modification to ibmtr.c were incorporated into.
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v2.2.17 July 2000 Burt Silverman (burts@us.ibm.com)
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Address translation feature of PCMCIA controller is usable so
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memory windows can be placed in High memory (meaning above
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0xFFFFF.)
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======================================================================*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/ptrace.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <linux/timer.h>
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#include <linux/module.h>
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#include <linux/ethtool.h>
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#include <linux/netdevice.h>
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#include <linux/trdevice.h>
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#include <linux/ibmtr.h>
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#include <pcmcia/cs_types.h>
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#include <pcmcia/cs.h>
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#include <pcmcia/cistpl.h>
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#include <pcmcia/ds.h>
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#include <asm/uaccess.h>
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#include <asm/io.h>
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#include <asm/system.h>
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#define PCMCIA
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#include "../tokenring/ibmtr.c"
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#ifdef PCMCIA_DEBUG
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static int pc_debug = PCMCIA_DEBUG;
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module_param(pc_debug, int, 0);
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#define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)
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static char *version =
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"ibmtr_cs.c 1.10 1996/01/06 05:19:00 (Steve Kipisz)\n"
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" 2.2.7 1999/05/03 12:00:00 (Mike Phillips)\n"
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" 2.4.2 2001/30/28 Midnight (Burt Silverman)\n";
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#else
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#define DEBUG(n, args...)
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#endif
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/*====================================================================*/
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/* Parameters that can be set with 'insmod' */
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/* MMIO base address */
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static u_long mmiobase = 0xce000;
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/* SRAM base address */
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static u_long srambase = 0xd0000;
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/* SRAM size 8,16,32,64 */
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static u_long sramsize = 64;
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/* Ringspeed 4,16 */
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static int ringspeed = 16;
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module_param(mmiobase, ulong, 0);
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module_param(srambase, ulong, 0);
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module_param(sramsize, ulong, 0);
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module_param(ringspeed, int, 0);
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MODULE_LICENSE("GPL");
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/*====================================================================*/
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static int ibmtr_config(struct pcmcia_device *link);
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static void ibmtr_hw_setup(struct net_device *dev, u_int mmiobase);
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static void ibmtr_release(struct pcmcia_device *link);
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static void ibmtr_detach(struct pcmcia_device *p_dev);
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/*====================================================================*/
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typedef struct ibmtr_dev_t {
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struct pcmcia_device *p_dev;
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struct net_device *dev;
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dev_node_t node;
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window_handle_t sram_win_handle;
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struct tok_info *ti;
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} ibmtr_dev_t;
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static void netdev_get_drvinfo(struct net_device *dev,
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struct ethtool_drvinfo *info)
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{
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strcpy(info->driver, "ibmtr_cs");
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}
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static const struct ethtool_ops netdev_ethtool_ops = {
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.get_drvinfo = netdev_get_drvinfo,
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};
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/*======================================================================
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ibmtr_attach() creates an "instance" of the driver, allocating
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local data structures for one device. The device is registered
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with Card Services.
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======================================================================*/
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static int __devinit ibmtr_attach(struct pcmcia_device *link)
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{
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ibmtr_dev_t *info;
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struct net_device *dev;
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DEBUG(0, "ibmtr_attach()\n");
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/* Create new token-ring device */
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info = kzalloc(sizeof(*info), GFP_KERNEL);
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if (!info) return -ENOMEM;
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dev = alloc_trdev(sizeof(struct tok_info));
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if (!dev) {
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kfree(info);
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return -ENOMEM;
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}
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info->p_dev = link;
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link->priv = info;
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info->ti = netdev_priv(dev);
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link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
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link->io.NumPorts1 = 4;
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link->io.IOAddrLines = 16;
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link->irq.Attributes = IRQ_TYPE_EXCLUSIVE | IRQ_HANDLE_PRESENT;
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link->irq.IRQInfo1 = IRQ_LEVEL_ID;
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link->irq.Handler = &tok_interrupt;
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link->conf.Attributes = CONF_ENABLE_IRQ;
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link->conf.IntType = INT_MEMORY_AND_IO;
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link->conf.Present = PRESENT_OPTION;
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link->irq.Instance = info->dev = dev;
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SET_ETHTOOL_OPS(dev, &netdev_ethtool_ops);
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return ibmtr_config(link);
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} /* ibmtr_attach */
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/*======================================================================
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This deletes a driver "instance". The device is de-registered
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with Card Services. If it has been released, all local data
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structures are freed. Otherwise, the structures will be freed
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when the device is released.
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======================================================================*/
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static void ibmtr_detach(struct pcmcia_device *link)
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{
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struct ibmtr_dev_t *info = link->priv;
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struct net_device *dev = info->dev;
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struct tok_info *ti = netdev_priv(dev);
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DEBUG(0, "ibmtr_detach(0x%p)\n", link);
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/*
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* When the card removal interrupt hits tok_interrupt(),
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* bail out early, so we don't crash the machine
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*/
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ti->sram_phys |= 1;
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if (link->dev_node)
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unregister_netdev(dev);
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del_timer_sync(&(ti->tr_timer));
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ibmtr_release(link);
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free_netdev(dev);
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kfree(info);
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} /* ibmtr_detach */
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/*======================================================================
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ibmtr_config() is scheduled to run after a CARD_INSERTION event
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is received, to configure the PCMCIA socket, and to make the
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token-ring device available to the system.
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======================================================================*/
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#define CS_CHECK(fn, ret) \
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do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
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static int __devinit ibmtr_config(struct pcmcia_device *link)
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{
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ibmtr_dev_t *info = link->priv;
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struct net_device *dev = info->dev;
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struct tok_info *ti = netdev_priv(dev);
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win_req_t req;
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memreq_t mem;
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int i, last_ret, last_fn;
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DEBUG(0, "ibmtr_config(0x%p)\n", link);
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link->conf.ConfigIndex = 0x61;
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/* Determine if this is PRIMARY or ALTERNATE. */
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/* Try PRIMARY card at 0xA20-0xA23 */
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link->io.BasePort1 = 0xA20;
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i = pcmcia_request_io(link, &link->io);
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if (i != 0) {
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/* Couldn't get 0xA20-0xA23. Try ALTERNATE at 0xA24-0xA27. */
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link->io.BasePort1 = 0xA24;
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CS_CHECK(RequestIO, pcmcia_request_io(link, &link->io));
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}
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dev->base_addr = link->io.BasePort1;
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CS_CHECK(RequestIRQ, pcmcia_request_irq(link, &link->irq));
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dev->irq = link->irq.AssignedIRQ;
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ti->irq = link->irq.AssignedIRQ;
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ti->global_int_enable=GLOBAL_INT_ENABLE+((dev->irq==9) ? 2 : dev->irq);
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/* Allocate the MMIO memory window */
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req.Attributes = WIN_DATA_WIDTH_16|WIN_MEMORY_TYPE_CM|WIN_ENABLE;
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req.Attributes |= WIN_USE_WAIT;
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req.Base = 0;
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req.Size = 0x2000;
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req.AccessSpeed = 250;
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CS_CHECK(RequestWindow, pcmcia_request_window(&link, &req, &link->win));
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mem.CardOffset = mmiobase;
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mem.Page = 0;
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CS_CHECK(MapMemPage, pcmcia_map_mem_page(link->win, &mem));
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ti->mmio = ioremap(req.Base, req.Size);
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/* Allocate the SRAM memory window */
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req.Attributes = WIN_DATA_WIDTH_16|WIN_MEMORY_TYPE_CM|WIN_ENABLE;
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req.Attributes |= WIN_USE_WAIT;
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req.Base = 0;
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req.Size = sramsize * 1024;
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req.AccessSpeed = 250;
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CS_CHECK(RequestWindow, pcmcia_request_window(&link, &req, &info->sram_win_handle));
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mem.CardOffset = srambase;
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mem.Page = 0;
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CS_CHECK(MapMemPage, pcmcia_map_mem_page(info->sram_win_handle, &mem));
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ti->sram_base = mem.CardOffset >> 12;
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ti->sram_virt = ioremap(req.Base, req.Size);
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ti->sram_phys = req.Base;
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CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link, &link->conf));
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/* Set up the Token-Ring Controller Configuration Register and
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turn on the card. Check the "Local Area Network Credit Card
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Adapters Technical Reference" SC30-3585 for this info. */
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ibmtr_hw_setup(dev, mmiobase);
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link->dev_node = &info->node;
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SET_NETDEV_DEV(dev, &handle_to_dev(link));
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i = ibmtr_probe_card(dev);
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if (i != 0) {
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printk(KERN_NOTICE "ibmtr_cs: register_netdev() failed\n");
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link->dev_node = NULL;
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goto failed;
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}
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strcpy(info->node.dev_name, dev->name);
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printk(KERN_INFO
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"%s: port %#3lx, irq %d, mmio %#5lx, sram %#5lx, hwaddr=%pM\n",
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dev->name, dev->base_addr, dev->irq,
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(u_long)ti->mmio, (u_long)(ti->sram_base << 12),
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dev->dev_addr);
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return 0;
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cs_failed:
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cs_error(link, last_fn, last_ret);
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failed:
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ibmtr_release(link);
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return -ENODEV;
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} /* ibmtr_config */
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/*======================================================================
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After a card is removed, ibmtr_release() will unregister the net
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device, and release the PCMCIA configuration. If the device is
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still open, this will be postponed until it is closed.
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======================================================================*/
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static void ibmtr_release(struct pcmcia_device *link)
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{
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ibmtr_dev_t *info = link->priv;
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struct net_device *dev = info->dev;
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DEBUG(0, "ibmtr_release(0x%p)\n", link);
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if (link->win) {
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struct tok_info *ti = netdev_priv(dev);
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iounmap(ti->mmio);
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pcmcia_release_window(info->sram_win_handle);
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}
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pcmcia_disable_device(link);
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}
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static int ibmtr_suspend(struct pcmcia_device *link)
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{
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ibmtr_dev_t *info = link->priv;
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struct net_device *dev = info->dev;
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if (link->open)
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netif_device_detach(dev);
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return 0;
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}
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static int __devinit ibmtr_resume(struct pcmcia_device *link)
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{
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ibmtr_dev_t *info = link->priv;
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struct net_device *dev = info->dev;
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if (link->open) {
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ibmtr_probe(dev); /* really? */
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netif_device_attach(dev);
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}
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return 0;
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}
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/*====================================================================*/
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static void ibmtr_hw_setup(struct net_device *dev, u_int mmiobase)
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{
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int i;
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/* Bizarre IBM behavior, there are 16 bits of information we
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need to set, but the card only allows us to send 4 bits at a
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time. For each byte sent to base_addr, bits 7-4 tell the
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card which part of the 16 bits we are setting, bits 3-0 contain
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the actual information */
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/* First nibble provides 4 bits of mmio */
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i = (mmiobase >> 16) & 0x0F;
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outb(i, dev->base_addr);
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/* Second nibble provides 3 bits of mmio */
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i = 0x10 | ((mmiobase >> 12) & 0x0E);
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outb(i, dev->base_addr);
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/* Third nibble, hard-coded values */
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i = 0x26;
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outb(i, dev->base_addr);
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/* Fourth nibble sets shared ram page size */
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/* 8 = 00, 16 = 01, 32 = 10, 64 = 11 */
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i = (sramsize >> 4) & 0x07;
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i = ((i == 4) ? 3 : i) << 2;
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i |= 0x30;
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if (ringspeed == 16)
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i |= 2;
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if (dev->base_addr == 0xA24)
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i |= 1;
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outb(i, dev->base_addr);
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/* 0x40 will release the card for use */
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outb(0x40, dev->base_addr);
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return;
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}
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static struct pcmcia_device_id ibmtr_ids[] = {
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PCMCIA_DEVICE_PROD_ID12("3Com", "TokenLink Velocity PC Card", 0x41240e5b, 0x82c3734e),
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PCMCIA_DEVICE_PROD_ID12("IBM", "TOKEN RING", 0xb569a6e5, 0xbf8eed47),
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PCMCIA_DEVICE_NULL,
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};
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MODULE_DEVICE_TABLE(pcmcia, ibmtr_ids);
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static struct pcmcia_driver ibmtr_cs_driver = {
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.owner = THIS_MODULE,
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.drv = {
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.name = "ibmtr_cs",
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},
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.probe = ibmtr_attach,
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.remove = ibmtr_detach,
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.id_table = ibmtr_ids,
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.suspend = ibmtr_suspend,
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.resume = ibmtr_resume,
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};
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static int __init init_ibmtr_cs(void)
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{
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return pcmcia_register_driver(&ibmtr_cs_driver);
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}
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static void __exit exit_ibmtr_cs(void)
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{
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pcmcia_unregister_driver(&ibmtr_cs_driver);
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}
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module_init(init_ibmtr_cs);
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module_exit(exit_ibmtr_cs);
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